Safety lock



Dec. 4, 1962 Filed Dec. 1, 1959 so 0 38 5 4: e 3? 43 A. CREPINSEK SAFETY LOCK 2 Sheets-Sheet 1 Jnven/ar: A /0/'s C r spin/56A Dec. 4, 1962 A. CREPINSEK 3,066,523

SAFETY LOCK Filed Dec. 1, 1959 2 Sheets-Sheet 2 J0 venlor: A/o is CF J J sC/Y 33%5523 Patented Dec. 4, i962 fire 1 3,056,523 SAFETY LGQK Alois Crepinsek, Los Angeies, tlalii, assignor to International Lock Corps, Memphis, Tenn, a corporation of Tennessee Filed Dec. l, 1959, her. No. 856,617

tjlaims priority, application Germany Mar. 21, 1959 4 Claims. (ill. 70-150) The present invention relates to improvements in safety locks of the kind comprising a casing with spaced parallel side walls embedded in the door, a latch bolt slidably disposed within said casing and yieldably held in its locking position by a spring, a transverse tubular bearing sleeve traversing said casing and said latch bolt and projecting outwardly from said casing on both opposite sides of the casing and being rigidly secured in said casing walls against rotation turn knobs with guide sleeves pivotally but not movable in axial direction, mounted on said projecting outer ends of said tubular bearing sleeve and being in engagement with said latch bolt for retracting the latter, a central cylindrical lockjng member for said latch bolt pivotally but not movable in axial direction rotatably disposed in said tubular bearing sleeve and projecting on both sides out of said casing.

The known safety locks of this kind have complicated locking mechanisms which are difficult in manufacturing and mounting at the door or unsatisfying in se curing the door against illegal opening it by force. Furthermore, the known safety locks are therefore Very limited in their application and use.

It is the object of this invention to overcome these disadvantages and to improve the known safety locks by simple but effective means for permitting easy manufacturing and mounting at the door and better security against illegal opening with force.

For this purpose a safety lock of the aforesaid kind comprises at least two outer hollow cylindrical sleeve portions of said tubular bearing sleeve secured at its inner ends in said casing side walls against rotation, interengaging means between said central cylindrical locking and the outer parts of said bearing sleeve portions to hold the latter in their operating position at the casing and to permit rotation of central locking member with said bearing sleeve portions and driving means in said turn-knobs for rotating said central locking member from outside of the casing. The interengaging means between said central cylindrical locking member and the outer parts of said bearing sleeve portions including a removable projection at one part and an opposite annular groove at the other part for engagement with each other. The outer hollow cylindrical sleeve portions of said tubular bearing sleeve are provided with inner ends of reduced outer diameter and longitudinal slots in said re; duced parts, said side Walls of the lock casing having circular holes for inserting said reduced parts of the cylindrical sleeve portions with radially inwardly projecting tongues engaging said longitudinal slots when said reduced ends of said cylindrical sleeve portions are inserted in said holes of the casing side walls.

At the latch bolt there is rigidly mounted a rod-like tentacle extending in longitudinal direction thereof and with its free end cooperating with corresponding transverse passage openings in the intermediate part of the bearing sleeve portions and in the central pivotal cylindrical locking member which correspond in cross section. in the turn knobs there are provided driving means for said central cylindrical locking member from outside of said casing. Preferably an intermediate hollow cylindrical sleeve portion is disposed between the two outer sleeve portions and within the casing interconnected with said outer sleeve portions and the side walls of the casing and secured against rotation.

Further features of the invention are explained in the specification in relation with the accompanying drawings, where some embodiments of the invention are represented.

Further features of the invention are explained in the specification in relation with the accompanying drawings, where some embodiments of the invention are represented.

FIG. 1 shows an embodiment of the essential parts of the safety latch bolt lock, with a subdivided bearing sleeve and a transverse cylindrical locking member for a tentacle fixed to the latch bolt, seen from above, partly in horizontal section, with the latch bolt in locking position and the locking member in position for passage of the tentacle, when the latch bolt is retracted;

FIG. 2 the safety lock in section along the line 11-11 of FIG. 1, with tne locking member in position for avoiding the retraction of the latch bolt with the tentacle;

FIGS. 3 and 4 different embodiments of the free end of the latch bolt tentacle and the corresponding part of the locking member in the position to permit retracting of the latch bolt and in the position to avoid retracting of the latch bolt and in stop position;

FIG. 5 the cylindrical locking member and the surrounding parts in cross section according to line VV of H6. 1;

H65. 6, 7, and 8 show an embodiment of the bearing sleeve subdivided into three portions in perspective view;

FIGS. 9 and 10 an embodiment of the bearing sleeve subdivided into two portions in perspective view;

FlG. ll an embodiment of the cylindrical locking member in perspective view;

FIG. 12 parts of the safety lock in vertical cross section according to line XilXlI of FIG. 1;

FIG. 13 the inner end of a turn knob guide sleeve with coupling ring and axial projection for engagement with the latch bolt in perspective view;

FlGS. l4 and 15 parts of the safety lock in vertical cross section according to lines XlV-XIV and XV-XV of FIG. 1;

FIG. 16 an embodiment of the driving member in the inner turn knob for the inner pivotal cylindrical locking member in perspective View;

FIG. 17 shows parts of the safety lock in vertical cross section according to line XVIlXVll of FIG. 1.

H68. 1 and 2 show the spaced parallel side walls of the casing l of the safety lock, which is embeded in the door. In the casing 1 a latch bolt 2 is slidably positioned in its longitudinal direction, and a cylindrical locking member 3 traverses the casing 1 and the latch bolt 2. The cylindrical locking member 3 is pivotally but not movable in axial direction and is disposed in a tubular bearing sleeve, which preferably is subdivided into three portions 4, S, d, which are not rotatable and not movable in axial direction secured to the walls of the casing it. The latch blot 2 is yieldingly held in its locking position by the spring '7 and can be retracted out of its locking position by turn knobs 8, 9 with guide sleeves 10 pivotally mounted on the outer projecting ends of the bearing sleeve portions 4, surrounding said cylindrical locking member 3. The guide sleeves it of the turn knobs S, 9 are rigidly connected at their inner ends with rings 11, which project preferably with arc-shaped projection through arc-shaped slits 13 in the side walls of the casing i into ti interior of the lock casing and act upon a frame 34 rigidly secured to the latch bolt when the turn knobs are turned to the right or to the left for retracting the latch bolt 2 out of its locking position.

The latch bolt 2 is at its inner or rear side provided with a longitudinal rod or tentacle 15 of any cross section which preferably is secured to the latch bolt by thread connection. The free end of tenacle 15 has a.

sesame cross section, preferably circular, which mates with traverse passage openings in and it? which are in, respectively, the bearing sleeve portion 6 and the cylindrical locking member 3. The traverse passage openings 11; and 13 are of cross section corresponding to the tentacle 15 cross section and serve as guide bores for the bar 15. The rearward part of the frame 14, secured to the latch bolt 2, has also a passage opening 2%) for the tentacle 15 to permit the tentacle to pass therethrough when it is screwed into the latch bolt 2.

The cross section of the free end of the tentacle and the respective passage openings l6, l3, and in c be placed eccentrieally with respect to the longitudinal central line of the tentacle 15 (FIG. 3), or can be made with flat cross section at the cylindrical locking member 3 and With fork-like cross section at the tentacle (H6. 4).

In order to secure the two angularly spaced end positions of pivotal movement of the cylindrical locking member 3, one of which permits the passing of the free end of the tentacle 15 through the transverse passage opening 18 in the cylindrical locking member (FIG. 1), whereas in the other position (FIG. 2) the cylindrical locking member 3 stops the retraction of the tentacle 1L and the latch bolt 2, arresting means for the cylindrical locking member 3 are provided. These arresting means incluoe a transverse bore 21 in the cylindrical locking member 3, a springloaded ball 2-2 in said bore, whereas in the surrounding bearing sleeve portion 5 bores 23, 24 of smaller diameter than the ball 22 are portioned in an angular space of 90 from each other (FIGS. 1, 5).

The cylindrical locking member 3 must be turned in the position of FIG. 1 in which the passage opening 13 in the cylindrical locking member 3 is in coordination with the passage holes 16 of the stationary bearing sleeve portion 6, when the latch bolt 2 with the tentacle has to be retracted against the action of the spring 7 during opening or closing the door, for permitting the passage of the free end of the tentacle 1"" through the passage opening 18 of the cylindrical locking member 3. For avoiding retraction of the latch belt 2 with tentacle 15 the cylindrical locking member 3 must be rotated for an angle of 98 in the position of FIG. 2.

The tubular bearing sleeve for the cylindrical locking member 3 is subdivided into several portions for making the mounting and the dernounting of the safety lock parts easier. In the embodiment of FIGS. 1, 6, 7, and 8 the tubular bearing sleeve is subdivided into three portions 4, 5, 6 of which the intermediate portion 6 is disposed between the casing side walls, and projects with reduced end parts 25 into the passage openings 29 of the side walls and is provided at these opposite end parts 25 with diametrically opposed slits 26 in which engage diametrically positioned and radially inwardly projecting tongues or lugs of the rim of the passage openings 29. Angularly spaced from the slits 2e are provided further diametrically opposed slits 27 in the end parts of the intermediate hearing sleeve portion 6, in which engage diametrically opposed lugs 28 at the opposite end faces of the outer bearing sleeve portions 4, 5 which traverse also the passage openings 29 in the side walls.

The outer diameter of the outer bearing sleeve portions 4, 5 corresponds with the diameter of the reduced end parts of the intermediate bearing sleeve portion 6. in the intermediate bearing sleeve portion 5 the transverse passage openings id for the tentacle 15 are provided. The guide sleeves to of the turn buttons 8, 9 have passage openings 31 for screws which will be described later. One of the outer bearing sleeve portions 4, 5 has the radial arresting bores 23, 24 angularly spaced from each other for an angle of 90 and opposite the arresting ball 22 in the pivotal axle.

Of the outer sleeve portions 4', 5' the sleeve portion 5 is provided with a radial thread bore 32 spaced from the side Wall, Where a screw 33 is inserted which with an end part engages an annular groove 34 in the pivotal cylindrical locking mern er 3. The other outer bearing sleeve portion 4 is also provided with a radial thread bore 35 for a screw 36, projecting with its inner end into an annular groove 37 of the cylindrical locking member 3, and simultaneously fixing a guide sleeve 33 with rings 39, 44} to the bearing sleeve portion 4, upon which the guide sleeve 15% of the inner turn button 3 is pivotally mounted. The guice sleeve 16 of the inner turn knob 8 is surrounded by a guide sleeve 49 fastened at the inside of the door.

in a bore 42 with conical end a driving member with a conical head 43, an outwardly projecting transverse handle 4-5, and a cylindrical part -44 are inse ted into the inner turn knob 8. By a plate-like transverse inner projection i6 which engages a transverse slit ,7 in the opposite end face of the central cylindrical locking member 3, the driving member 23, 4'4, 45 is in dr'ving connection with the cylindrical locking member 3. From the cylindrical part 44 a radial projecting pin engages an annular groove Si? in the surrounding guide sleeve and the ring as. Thus, the inner turn knob 8 with its guide sleeve it; is pivotally but not movable in axial direction guided and held upon the guide sleeve For the removal of the screw 36 out of the thread bore 35 in the bearing sleeve portion 4, and in the guide sleeve 38 with the ring 39 are provided in the guide sleeve it of the inner turn knob 8, one or several radial passage openings. By the engagement of the radial screws 33, 36 with the annular grooves 34, 37 in the cylindrical locking member the three portions 4, 5, 6 of the bearing sleeve are held not movable in axial direction in their operating position.

In the outer turn knob 9 with its guide sleeve li in a preferably shouldered bore 51, a cylindrical casing 52 of a cylindrical lock 53 is mounted, of which a hollow cylindrical part 54 is placed between the guide sleeve liia and the outer bearing sleeve portion 5, and rigidly connected to the latter by the radial screw 33. In the guide sleeve lla of the outer turn knob 9 a radial thread bore, and in this bore a screw, can be disposed which abuts with its inwardly projecting end against the inner end of the hollow cylindrical part 5 of the casing 52. Thus, the guide sleeve 16a and its outer turn knob 9 are pivotally but not movable in axial direction arranged and connected with the other parts of the safety lock. The guide sleeve 19a of the outer turn knob 9 is covered by a surrounding sleeve 41a which is rigidly but detachably fixed to the outside of the door. The turning cylinder 53 of the cylindrical lock has at its inner end face an eccentrically disposed lug 59 by which it can be brought into driving connection with a lug eccentrically disposed at the end face of the cylindrical locking member 3, for rotating the latter. The lug oil at the cylindrical locking member 3 can have a flat or an angular cross section, as is seen in FIG. 17. In the position of these lugs 59, 6t? to each other, shown in FIG. 17, the cylindrical locking member 3 is independent from the turn-cylinder 58 of the cylindrical lock 53, so that the cylindrical locking member 3 can be turned from the inside of the door by the handle 4-3, 44, 45 in the inner turn knob 8. By turning the turncylinder 58 of the cylindrical lock 53 in the outer turn button 9 by means of the corresponding key, the lug 59 is moved in the path range of the flat or angular lug at of the cylindrical locking member 3, and rotates the latter from one end position of its rotating movement into the other end position, to the right or to the left just as in what direction the turn-cylinder 53 is rotated.

in FIGS. 9 and 10 an embodiment of the bearing sleeve with two portions 61, 62. is illustrated. The two portions 61, 62 project with shouldered hollow cylindrical end parts 63, 64 of smaller outer diameter through the passage openings 29 in the side walls into the interior of the lock casing 31, and are provided with diametrically opposed, longitudinal slits 65 in which engage the radially and inwardly projecting tongues or lugs 33% of the side walls, for mounting the said bearing sleeve portions not aoeasas rotatable and fixed in the side walls. Of the shouldered end parts 63, 64 of the bearing sleeve portions 61, 62 the end part 64 is longer than the other end part 63, and provided with the diametrically opposed passage opening 16 for the tentacle 15 of the latch bolt 2. The outer hearing sleeve portion 62 is provided with the thread bore 32 for the screws 33, and the arresting bores 23, 24 for the arresting ball 22, whereas the inner bearing sleeve portion 61 is provided with the thread bore 35 for the screw 36, as already described with respect to the bearing sleeve portions 4, 5, and 6 in FIG. 1.

The longitudinal slits in the bearing sleeve portions 4, 5, 6, respectively 61, 62, and the respective radial projections 31) from the passage openings 29 in the casing Walls 1 can also be arranged not diametrically, but can be distributed in any other Way over the circumference of said bearing sleeve portions and said passage openings.

By the basic structure described a connection of the bearing sleeve portions 4, 5, 6, respectively 61, 62, is attained which is simple and can be manufactured cheaply, and which secures the rigid position of the bearing sleeve portions and permits easy mounting and demounting of all parts of the safety lock.

if the bearing sleeve portions 4, 5, 6 shall be separated f om the cylindrical locking member 3 and the other parts of the safety lock, the inner door guide sleeve 41 is positioned with its passage hole for the head screw 36 in coordination with the passage hole in the inner turn knob guide sleeve it the screw 36 is screwed out of the thread bore 35, and the bearing sleeve portion 4 with the inner turn knob 8 and its guide sleeve are removed from the cylindrical locking member 3. Subsequently the bearing sleeve portion 5 with the outer turn knob 9 attached thereto, and the whole cylindrical locking memher 3, can be removed on the opposite side from the casing 1, respectively out of the passage openings 29 in the side walls of the lock casing 1. The mounting of the different parts of the safety lock is executed in reversed succession. The cylindrical locking member 3 can remain in connection with the outer bearing sleeve portion 5 and all parts which are fastened to it.

What I claim is:

1. A safety door lock comprising a casing having side walls disposed within a door, a latch bolt slidably disposed within said casing and extendable therefrom to locking position, a spring means resiliently urging said latch bolt toward locking position, a tentacle affixed to the casing side of said latch bolt and extending longitudinally thereof, a tubular bearing sleeve perpendicularly aflixed to said casing with respect to said tentacle and providing a continuous axial passage from one side of the door to the opposite side, said bearing sleeve having a passage perpendicular to the axis thereof and aligned with said tentacle to provide passage of said tentacle through said bearing sleeve, guide sleeves rotatably mounted upon both ends of said bearing sleeve, each of said guide sleeves having an arc-shaped projection afiixed to the inner end thereof, a frame rigidly fixed to said latch bolt and extending from said latch bolt to the opposite side of said bearing sleeve, each of said projections on said guide sleeves positioned for contacting said frame to move said frame and said latch bolt into unlocked position by rotation of either of said guide sleeves, knobs rigidly aflixed to the outer ends of both of said guide sleeves, a rotatable cylindrical locking member positioned axially within said bearing sleeve, said cylindrical locking member having a passage perpendicular to the axis thereof alignable with said passage in said bearing sleeve, driving means in said knobs for rotating said cylindrical locking member from either side of the door, said cylindrical locking member rotatable by said drive means from a position in which said passage in said cylindrical locking member is aligned with the axis of said tentacle to a position at 90 thereto and in which position said cylindrical locking member prevents said latch bolt from being retracted by rotation of either of said knobs and said bearing sleeve providing rotation bearing support for said guide sleeves and for said cylindrical locking member and said perpendicular passage in said bearing sleeve providing for support for said tentacle.

2. A safety door lock as defined in claim 1 wherein, said tubular bearing sleeve consists of at least two hollow cylindrical sleeve portions rigidly aflixed to said casing side walls and extending from said side walls outwardly to both sides of the door, and said bearing sleeve having at least one cooperating portion extending between the side walls of said casing and said cooperating portion having therein said passage perpendicular to the axis of said bearing sleeve, said cylindrical sleeve portions and said cooperating portion easily disassemblable for allowing ease of dismantling of said safety door lock.

3. A safety lock as defined in claim 11 wherein, arcshaped openings are provided in said casing side walls for allowing said arc-shaped projection of each of said guide sleeves to extend therethrough, said guide sleeves rotatable about an angle defined by the cooperation of said projections with said arc-shaped openings.

4. In a safety door lock having a casing with side walls disposed in a door, a latch bolt slidably disposed Within said casing and extendable therefrom to locking position, a spring means resiliently urging said latch bolt toward locking position, a tentacle afiixed to the casing side of said latch bolt and extending longitudinally thereof, and said door lock having rotatable guide sleeves for moving said latch bolt to and from locking position and extending perpendicularly of said tentacle outwardly from said casing side walls to the outside plane of the door, knobs rigidly afiixed to the outer ends of both of said guide sleeves, and having a rotatable cylindrical locking member positioned axially within said guide sleeves and having no contact therewith, said cylindrical locking member having a passage perpendicular to the axis thereof alignable with the axis of said tentacle, driving means in said knobs for rotating said cylindrical locking member from either side of the door, said cylindrical locking member rotatable by said drive means from a position in which said passage in said cylindrical locking member is aligned with the axis of said tantacle to a position of thereto and in which position said cylindrical locking member prevents said latch bolt from being retracted by preventing said tentacle from moving into said casing, the improvement comprising; a tubular bearing sleeve perpendicularly affixed to said casing with respect to said tentacle and providing a continuous axial passage from one side of the door to the opposite side, said tubular bearing sleeve consisting of at least two hollow cylindrical sleeve portions rigidly affixed to said casing side walls and extending from said side Walls outwardly to both sides of the door, said bearing sleeve having at least one cooperating portion extending between the side Walls of said casing and said cooperating portion having therein a passage perpendicular to the axis of said bearing sleeve and aligned with respect to the axis of said tentacle, said cylindrical sleeve portions and said cooperating portion easily disassemblable for allowing ease of dismantling of said safety door lock, and said bearing sleeve providing rotation bearing support for said guide sleeves and for said cylindrical locking member and said passage in said bearing sleeve providing: slide bearing support for said tentacle.

References Cited in the tile of this patent UNITED STATES PATENTS 32,270 Adt May 14, 1861 63,230 Dickson Mar. 26, 1867 1,566,575 Best Dec. 22, 1925 1,916,266 Hillgren et al. July 4, 1933 FOREIGN PATENTS 421,384 Great Britain Dec. 19, 1934 

